Add "required" parameter to pywebio.input.checkbox

[quadratecode]

First of all: Thanks to the devs for this excellent tool.

According to the docs, pywebio.input.checkbox does not support the "required" parameter like most other input types.

In cases where the checkbox is typically required (e.g. terms and conditions), the script continues even if they do not check it, hence this feature request. Is there a workaround to this problem?

[wang0618]

The reason that pywebio.input.checkbox() does not support the "required" parameter is that selecting empty option is also valid in some cases. If you want the some items of the checkbox must be chosen, you can use the validate parameter:

def validate(opt):
    # print(opt)
    if not opt:
        return "You must accept the terms to continue"

input_group("Sign up", [
    input("User name", name='user', required=True),
    checkbox(options=["I accept the terms"], name='term', validate=validate)
])

[quadratecode]

Ah I see, that makes sense.

Using the validate parameter worked perfectly - thanks for the swift reply!